Laurence j



(No Model.)

L. J. TRECY.

SMOKE GoNsUMING FURNAGE. l No. 498,197. Patented May 23, 1893.

, UNITED STATES PATENT OEEICE. i

LAURENCE J. TREcY, oF sT. LOUIS, MISSOURI, ASsIeNoR 0E EIVE-EIGHTHS ToTHEoDoEE ALBES AND AUGUST M. BLINKE, 0E SAMEPLACE.

sMoKE-CoNsUMlNG FURNACE.

SPECIFICATION forming part of Letters Patent No. 498,197, dated May 23,1893.

Application filed January 23, 1893. Serial No. 459.355. (No model.)

To a/ZZ whom it may concern..-

Be it known that I, LAURENCE J. TRECY, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful Improvement inSmokeConsuming Furnaces, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming part of this specification.

My invention relates to certain improvements in furnaces, the objectbeing to iinprove the combustion, to provent smoke and save fuel.

My invention consists in features of novelty hereinafter fully describedand pointed out in the claim. Y y

Figure I is vertical, longitudinal section of my furnace, taken on lineI-I, Fig. II. Fig. II is a Vertical, transverse section, taken on lineII-IL Fig. I. FigqIII is a detail, horizontal section, taken on lineIII-III, Fig. II, parts being broken away.

Referring to the drawings, 1 represents the fire-box, 2 the combustionchamber, 3 the grate and 4 the ash-pit of the furnace. The fire-box ispreferably formed with a central box or partition 5, which divides itinto two parts, as s hown in Fig. II. This box is made hollow to form anair chamber.

6 are boxes arranged at the sides of the tirebox and 7 a box arranged atthe back of the fire-box. The boxes 6 and 7 are also made hollow to formair chambers. These boxes are all made of fire clay, so as to withstandthe heat and they are perforated, as shown at 8, to permit air to escapefromthe chambers into the ire-box, to provide for thorough combustion.

9 is an air chamber located behindy the bridge wall 10 of the furnace,into which air enters throughan opening l1. Within the chamber 9isa-steam coil 12 connecting with t-he boiler to heat the air in thechamber.

l3'is a flue connecting the chamber 9 with the box 7 to supply the airthat escapes through the perferations 8 of this box.

14 are tlues which extend from the chamber 9 to the forward ends of theboxes 5 and 6, as shown in Fig. I, andlwhich supply the air that escapesthrough the perforatious 8 of these boxes. The nues 14 are respectivelyarranged at the upper corners of the ash-pit and beneath ,the box 5, asshown in Fig. II.

15 are valves in the flues 14 to control the passage of air.

by which the valves are moved. The perforated boxes providefor a uniformadmission of air over the fire whichy results in a very thoroughcombustion of the fuel, and by heating the air in the chamber 9 it isdischarged into the lire-box inca highly heated condition, for it isfurther heated while passing through the flues 13 and'14. f

I claim as my invention- In a furnace, the combination of the perforatedhollow boxes, arranged in lthe fire-box, the chamber arranged behind thebridge wall of the furnace, a steam coil arranged in said chamber, andconnected with the boiler, and the tlues 13 and 14 connecting saidchamber with said boxes; substantially as and for the purpose set forth.

LAURENCE J. TREOY. In presence of- E. S. KNIGHT, ALBERT M. EBEESOLE.,

They have rods 16 which extend v vout through the front plate of theboiler and

